Crossword Genius

Not the first worker on watch? (10)

Ross

I believe the answer is:

secondhand

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'not the first worker on watch?' is the definition.
I can't judge whether this definition defines the answer.

'not the first worker on' is the wordplay.
'not the first' becomes 'second' (I can't explain this - if you can you should believe this answer much more).
'worker' becomes 'hand' (hand is a kind of worker).
'on' means one lot of letters go next to another.
'second'+'hand'='SECONDHAND'

Can you help me to learn more?

(Other definitions for secondhand that I've seen before include "feature on a watch" , "Used" .)

I've seen this clue in The Irish Independent.
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